Archives of Appalachia at ETSU – The Sherrod Library houses an extensive collection of books and microfilm for historical and genealogical research. The Archives of Appalachia includes manuscript collections relating to the history of Washington County as well as the Appalachian region in general.

Colonial and State Records of North Carolina(Chapel Hill, NC) – This collection provides a digital version of the Colonial and State Records of North Carolina series, which includes many important early documents related to Washington County and the frontier area of Tennessee.

East Tennessee Historical Society – Supports and preserves the region’s history through on-going museum exhibits and educational programs. Located in Knoxville, Tennessee.

Heritage Alliance of Northeast Tennessee & Southwest Virginia – Houses research collections of personal and family papers related to Jonesborough and Washington County genealogy and history, including the most extensive collection of historic photographs of the town. Manages the Chester Inn Museum, which has changing exhibits on Jonesborough and Washington County history. Also manages the Knob Creek schoolhouse, a restored 19th-century county school, as a living museum experience.

Johnson City Public Library – The Tennessee Room, located on the second floor of the library has an extensive reference book and microfilm collection for genealogical and historical research.

Jonesborough Genealogical Society – Assists researchers with family connections to Washington County and supports the genealogical section of the Jonesborough-Washington County Library.

Tennessee State Library and Archives – The largest research holdings for Tennessee history with records including birth and death records, microfilmed statewide county records, manuscript collections of personal and family papers, and much more.

Washington County TnGenWeb – A part of the USGenWeb and TNGenWeb websites, specific to Washington County, Tennessee. The page contains a wealth of information about the county, transcriptions of cemeteries, photos, and much more.

Watauga Association of Genealogists – assists researchers with family connections to Washington County and supports the genealogical section of the Johnson City Public Library. The organization meets monthly on the 1st Tuesday at the Johnson City Public Library between March and December.